Timed detonator for explosives.



M. W. QUIGGLE L G. E. BAILEY. TIMED DBTONATOR FOB. EXPLOSIV-ES. APILIGATION FILED MAY e, 1911.

1,088,448. Patented @1.2.1914

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MALCOLM W. QUIGGLE .AND GILBERT E. BAILEY/0F LGS ANGELES, CALIFORNIA;

sam BAILEY Ass'IeNoR T0 SAID QUIGGLE.,

TIMED DETONATOR FOR EXPLOSTTES.

Specification of Letters Patent.

Patentedlifeo. 2d, 39ML eppiication'aled May e, 1911. serial no. cease?.

To all 'whomt may concern Be it known that we, MALCOLM W.

` QUlcGLE and GILBERT E. BAILEY, citizens of the United States, both residing vat Los A ngeles, in the county of Los Angeles and State of California, have invented a new and useful Timed Detonator forExplosives, of which the following is a specificatio 1.

The object of our invention is to p ovide a detonator for explosives which is ignited by heat generated from an electric current with means whereby a greater or less time will elapse during which the fire is communicated from the `igniterV to ing compound to explode the same.

Our' invention consists in providing a detonator having a. metallic casing, and a detonating compound therein with means 'for producing an initial ignition, and combustible means arranged between the means for producing the initial ignition and the detonating material 4whereby the transmission of fire from the ignition means to the dctonating material may be regulated or controlled to consume a greater'or less degree of time as desired. Y v i The accompanying drawings illustrate a preferred form of our invention, but other forms and materials will present themselves to those versed in the art.

Figure l is an enlarged perspective elevation of our timed detonator, showing the metal shell and electrical wires for connection with a source of electrical energy. Fig. 2 is an enlarged longitudinal section showing a preferred formof loading ofthe detonator.

1 is a metal shell'which may be made of any desired shape or size.

2, 2 are wires adapted to be connected to a source of electrical energy, their ends 3, 3 ,being connected by a high resistance igniter wire 4.

5is a body of' fulminate of mercury or any other suitable detonating compound.

ln the detonator herewith illustrated we have shown as the means for regulating the communication of fire 4 to the fulminate 5 of anV instantaneous as pyroxylin,

from the igniter wire burning material, such commonly known as soluble 62, and having interspersed between such pyroxylin a slow burning material consisting of 'pyroxylin which has been dipped' in and fully saturated wwith camplior dissolved in alco` the detonatpressed and treated `a series of o r sections hol and which has afterward been compressed to form the slow burning diaphragme 7, 7.

is a paper tube, open at both ends, which surrounds the pyroxylin and the slow `burning diaphragms, such paper 8 having preferably been prepared to resist combustion by Vdipping the same in a solution of tungstatc of soda, thereby preventing the heat from the burning of one section of pyroxylin being transmitted to another section or body of that material through the heating of thewalls of the metallic shell. The burning of the first body of pyroxylin 6 ignites the first diaphragm' 7 of com` pyroxylin. @n account of its slow burning characteristics the ignition of the second body f pyroxylin G is delayed for an appreciable length of time or until the first diaphragm 7 has been burned and the fire communicated to the second section, which upon ignition is consumed practically instantaneously and ignites the second treated pyroxylin diaphragm 7 which after burning for an appreciable length of time ignites the third and last body of pyroxylin which instantly ignites the detonating material A suitable -cement 9 is used to close the open end of the cap shell.

y employing one or more roxylin and one or slow burning composition, we are enabled to accurately'time the final discharge of the .detonating material. This is especially necessary Where several charges of explosives are ignited by a current from a single source of electrical energy or when a number of charges of explosives are discharged in close proximity to one another as is necessary in mine Work.

By increasing or decreasing the thickness of the slow burning material interspersed between the ignition means and the detonati ng material the length of time required bodies of py- 'to finally explode the same is varied, and in practice detonators of quicker or slower burning qualities are provided for use where a series of explosions are required,

more diaplir'agnis of they as for example in rock work in mines. Or-

dinari-ly in such work more holes are. drilled ing. For example, two of such holes are drilled atV the foot of the wall, two holes are drilled at a point approxinnitely halt way up the wall and two holes at the top of' the a series of six or and loaded for firwall, and in ordinary practice the twojcenter holes are iired first and the bottom holes mum amount of work from a minimum,

amount of explosives.

Other forms of detonators may be em-l ployed than ,that shown and other material or materials may be employed for transmltting the fire from the igniter. to the detonating compound or mixture, but all such variations or changes whereby the lapse of an appreciable length ot' time occurs between the ignition and final explosion of a cap detonator is secured is considered by us to be within the scope of our invention.

The means herein described for communi-A cating the lire from'the igniter to the detonating material has theA distinguishing characteristics ot supporting its own combustion, igniting and burning without detonation or appreciable expansion. This is a desirable feature of our inventionas theV `whole load of the exploder is contained `within a metallic cap and if a combustible material which detonates when ignited is employed there is danger that such explo'- sion or expansion would cause the fulminate to be explodedbefore the time desired and such explosion would also disrupt the metallic4 cap in advance of the fulminating material.

What we claim is 1. In a detonating exploder, 4a shell, a

body of detonating material inthe shell, means for producing an initial ignition within the shell, a body interposed between the initial igniter and the detonating material com risin a section of a uick burning non-explosive material and aY slow burning non-explosive'materiah substantially as set forth.

2. In a detonating exploder, a shell, av body "of detonating material in the shell, means for producing initial ignition within the shell, a body of pyroxylin arranged within the shell, a body of pyroxylin arranged `to contact with the igniter, a body of compressed pyroxylin treated with ca mphor arranged between such pyroxylin andt the detonating material whereby 'a material lapse 'of time is consumed in transmitting iirefrom the igniter to such detonating material after the initial ignition is accomplished.

3. A detonating exploder comprising a metallic shell, a'body of detonating material in `the shell, means for producing an initial ignitionj- Within the4 shell, and a series of alternateslow -and quick burning materials connecting said detonating material andv said initial ignition means.

4. In a detonating exploder, a metallic shell, a heat insulating lining for the shell, a body of detonating material in the shell, means for producing an initial ignition within the shell, a body interposed between the initial igniter and the detonating material comprising a section of a quick burn- 1 ing non-explosive material and a slow burning non-explosive material, substantially as set forth;

5. In a detonating exploder a metallic shell', a heat insulating lining for the shell, a .body of detonating material in the shell, means for producing an initial :i nition within the shell, a body compose of a timed combustible non-explosive material arranged within the shell between the detonating material and the igniter, such timed combustible material being arranged to take fire from the igniter 'andcommunicate the same to the detonating material.

6. In a detonating exploder, a metallic shell, a heat insulating lining for the shell,`

a body of detonating material in the shell,

electrical means for producing an initial ignition within the shell, a timed combustible non-explosive material arranged between the detonatingl material and the igniter and adapted and arranged to conduct lire from such igniter to the detonating material,

7. In a detonating exploder, a containing member, a body of detonating material; in `said member, a body of pyroxylln 1n contact'with the detonating material, means lfor producing an initial ignition, 'a body of pyroxylin in contact with the igniter, and a body-of compressed pyroxylin' treated 'with campliory arranged'between aforesaid bodies of pyroxylin.

8. In a detonating exploder, a containing member, a' body of detonating material in said member, means for producing an initial ignition, an'd a body of pyroxylin treated with camphor between said body of detonating material andthe initial ignition means. In testimony whereof, we 'have hereunto set our hands at Los Angeles, California, this 28th day of April, 1911.- A

MALCOLM W. QUIGGLE. GILBERT E. BAILEY.

In lpresence of F. M. TowNsnND, P. II. Snai/ron. 

